25515252325 has 12 divisors (see below), whose sum is σ = 32157585508. Its totient is φ = 20077574400.

The previous prime is 25515252313. The next prime is 25515252397. The reversal of 25515252325 is 52325251552.

It can be written as a sum of positive squares in 6 ways, for example, as 2120326209 + 23394926116 = 46047^2 + 152954^2 .

It is not a de Polignac number, because 25515252325 - 2²⁵ = 25481697893 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8364132 + ... + 8367181.

Almost surely, 2^25515252325 is an apocalyptic number.

25515252325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25515252325 is a deficient number, since it is larger than the sum of its proper divisors (6642333183).

25515252325 is a wasteful number, since it uses less digits than its factorization.

25515252325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16731384 (or 16731379 counting only the distinct ones).

The product of its digits is 150000, while the sum is 37.

The spelling of 25515252325 in words is "twenty-five billion, five hundred fifteen million, two hundred fifty-two thousand, three hundred twenty-five".